Science One word answer.

The desirable agronomic characteristics for crop improvements are:

• Tallness and profuse branching in any fodder crop.
• Dwarfness in cereals.

Biotic factors such as pests, insects and diseases reduce the crop production. A pest causes damage to our crops by feeding. Weeds also reduce crop productivity by competing with the main crop for nutrients and light.
Similarly, abiotic factors such as temperature, wind, rain etc. affect the net crop production. For example droughts and floods have a great impact on crops sometimes, destroying the entire crop.

Fish can be obtained by two ways:

• Capture fishing: It is the process of obtaining fish from natural resources.
• Culture fishery: It is the practice of farming fishes. Farming can be done in both freshwater ecosystem (which includes river water, pond water) and marine ecosystem.

Benefits of cattle farming:

• Good quality and quantity of milk can be produced.
• Draught labour animals can be produced for agricultural work.
• New variety that are resistant to diseases can be produced by crossing two varieties with the desired traits.

Cattle farming is one of the methods of animal husbandry that is most beneficial for farmers. Using this method, better breeds of draught animals can be produced. Such draught animals are engaged in agricultural fields for labour work such as carting, irrigation, tilling, etc.

The factors responsible for loss of grains during storage are:

1. Abiotic factors like moisture (present in foodgrains), humidity (of air) and temperature.
2. Biotic factors like insects, rodents, birds, mites and bacteria.

False.
Explanation:
The given statement is False. This breed is otherwise called as Red Karachi and Sindhi and Mahi.

Field crops are infested with a variety of pests. There are various methods by which insects and diseases can be controlled. One of the most common and effective methods is the use of pesticides or biocides which include insecticides (for killing the insects), weedicides (for killing the weeds) and fungicides (for killing the fungi). Thus chemicals used to kill the pests, e.g. weeds; insects, mites, rodents and fungi are called pesticides. These chemicals are sprayed on crop plants or used for treating seeds and soil.

Introduction.

Rinderpest and foot and mouth diseases.

Roughage and concentrates.

45%.

Organic materials that are added to soil of crop field to improve its physical conditions are called manure.
Explanation:
It is rich in nutrients. It is used in gardens, landscaping, horticulture and agriculture.

Humid and Warm climate is more congenial for infestation of weeds, insect-pests and diseases.
Explanation:
Climate factors that aid in pest and disease invasions are mostly temperature related and include increasing average temperatures, warmer winter minimum temperatures, changes in precipitation patterns, and water shortages.

Blast is a fungal disease of paddy.
Explanation:
Rice blast is caused by one of the most devastating agricultural pathogens in the world, a fungus called Magnaporthe grisea (Hebert) Barr anamorph.

True.
Explanation:
The given statement is True. The pigeon pea (Cajanus cajan) is a perennial legume from the family Fabaceae. K850 is a plant improved variety of chickpea.

Mixed cropping is done to reduce the competition between component crops for light, nutrients and water.
Explanation:
It improves the productivity of the field and always two different crops are grown so that their nutrient requirement is different. It reduces the risk of crop failure.

The different aspects of fish culture are:
Marine fisheries Aquaculture Inland fisheries Composite fish culture.

Exotic (foreign) breeds are those which do not belong to our country and are of foreign origin.
Jersey, Brown swiss are two exotic foreign breeds. They have long lactation periods.

True.
Explanation:
The given statement is True. The Mehsana is a dairy breed of buffalo found in Mehsana, Sabarkantha and Banaskantha districts in Gujarat and adjoining Maharashtra state.

Blast.

Weeds are damage the wheat plant if we not kept away from crop field them they cause harm and excess damage of crop field so we have to spread pesticides or any medicine on the crop field keep away from crop field.

Lobsters or crabs and oysters.

Aseel is a popular breed of fowl.
Explanation:
It is a breed of famous rooster (chicken) originating from South Punjab/ Sindh area of Pakistan and India.

Cholera and tuberculosis.

The practice of growing of two crops simultaneously on the same piece of land is called Mixed cropping.
Explanation:
The successive planting of different crops simultaneously on the same land to maintain soil fertility and help control insects and diseases.

Kankrej is the breed that provides draught animals.

Indian poultry breed: Aseel.
Foreign poultry breed: Longhorn.
Desirable trait after cross breeding: Better quantity and quality of eggs and meat with good adaptability to local conditions.

True.

Explanation:

The given statement is True. Mixed cropping is growing of two or more crops simultaneously on the same piece of land. It is also known as multiple cropping.

The examples are:

1. Soybean + Pigeon pea, Maize + urad dal (Black gram)
2. Pigeon pea + Mung dal (Green gram).

Plants are ploughed and mixed into the soil.

For proper storage of grains the ideal moisture content is about 15% moisture content (wet basis).

A quick growing crop which is cultivated and ploughed under, to incorporate it into the soil for the purpose of improving its physical structure and fertility, is known as green manure.
For example: sunn hemp (sanai) crotalaria juncea.

Indigenous breeds (local breed of a region) of cattle is known for its disease resistance, good milk yield around 1200-1900 per lactation. Despite being lethargic and slow they can also be used for road and field works.

Oysters are also cultivated for making ornaments.

Irrigation depends on:

1. Nature of crop plants.
2. Nature of soil of the crop fields.

By the crosses between following breeds of cow:

1. Brown Swiss and Sahiwal.
2. Holstein-Friesian and Sahiwal.

Sugarcane.

Rinderpest.

Kharif crops: Paddy, maize, millet, soybean, groundnut and cotton crops are Kharif crops.
Rabi crop: Wheat, barley, mustard, sesame and peas are Rabi crops.

Japan is known to have highest pesticide load on their crop.
Explanation:
Japan uses maximum pesticides as there is scarcity of arable land. They aim to protect their crops from any damage and maintain the high levels of crop production.

Spallanzani.

Green plants are decomposed in soil.

True.
Explanation:
The given statement is True. Weed control is the botanical component of pest control, which attempts to stop weeds, especially noxious or injurious weeds, from competing with domesticated plants and livestock.

Food grown on organic farming principles is called organic food.
Explanation:
It is chemical free and high quality food in terms of nutrition and flavour. It passes through various quality check and then labelled as organic Food.

Murrah and Surti.

Ammonium sulphate.

It is economical, more reliable and hygienic method.

Crop rotation.

True.
Explanation:
The given statement is True. It is the variety of basmati rice in India.

Mr. Swaminathan is known as "Indian Father of Green Revolution".