Contents

**Crop Yield Estimation (Biological yield and economic yield)**

**Definition of Biological yield and economic yield**

The total dry matter produced by a crop is known as biological yield and a fraction of the biological yield which is useful for human is known as economic yield.

**Yield Estimation of Field Crops **

Yield estimation of various crops have been attempt with the use of yield components. Yield cost of Rice crop are as follows

**01. RICE**

What would be the yield of rice grains, if the average panicle density/m2 260, No. of field grains/panicle 136, Test weight 20g. Estimate the yield of rice?

__Solution__**Yield of rice (ton/ha) =**(10,000 X No. of panicle/m2 X No. of grains/panicle X Test weight) ÷ (1000 X 1000 X 100 X 10).

= (10,000 X 260 X 136 X 20) ÷ (1000 X 1000 X 100 X 10).

= 7.072 ton/ha.

**02. WHEAT**

Yield Estimation of wheat grain and straw from following information

· Spacing 20cm X 3cm.

· No. of effective tills/plant.

· No. of grains/panicle 32.

· Test weight 40 g.

· Grain: straw 1:1.5

__Solution__Spacing= 20 X 3 cm2 =0.2 X 0.03 m2= 0.006 m2

0.006 m2 place have 1 till

= 1 m2 place have (1 ÷ 0.006) till = 500 tills.

**Yield of wheat grain**= (10,000 X No. Effective tills/m2 X No. of grains/panicle X test weight) ÷ (1000 X 1000 X 100 X 10).

= (10,000 X 500 X 32 X 40) ÷ (1000 X 1000 X 100 X 10).

= 6.4 ton/ha.

**Yield of wheat straw**= (6.4 X 1.5) = 9.6 ton/ha. [Given that grain: straw= 1:1.5].

**03. MAIZE**

Yield Estimation of maize from following information

· Spacing 75cm X 30cm = 0.75 X 0.3 m2 =0.225 m2.

· No. of cobs-2.

· No. of grains row/cob-10.

· No. of seeds/grain row- 25.

· Test weight 200 g.

__Solution__**Yield of maize**= (10,000 X cobs/plant X grains row/cob X No. of seeds/grain row X test weight) ÷ (1000 X 1000 X 100 X 10 X spacing/m2).

= (10,000 X 2 X 10 X 25 X 200 g) ÷ (1000 X 1000 X 100 X 10 X 0.225).

= 4.44 ton/ha.

**04. SUGARCANE**

Yield Estimation of sugarcane from following information

· No. of millable cane/clump 15.

· Spacing of clump 90 X 60 cm2= 0.54 m2.

· Weight of cane 600 g.

__Solution__**Yield of Sugarcane**= (10,000 X No. of millable cane/clump X Weight of cane) ÷ (spacing/m2 X 1000 X 100 X 10)

= (10,000 X 600 X 15) ÷ (0.54 m2. X 1000 X 100 X 10).

= 166.66 ton/ha.

**05. JUTE FIBRE**

Yield Estimation of Jute fibre from following information

· Spacing of clump 25 X 10 cm2= 0.025 m2.

· Weight of matured plant 65 g.

· Extractable fibre/percent 7.5%.

__Solution__**Yield of Jute fibre**= (10,000 X Weight of matured plant X Extractable fibre/percent) ÷ (spacing X 1000 X 100 X 10).

= (10,000 X 7.5 X 65) ÷ (0.025 X 1000 X 100 X 100).

= 19.5 Quintal/ha.

**Useful Agricultural Websites**