Crop Yield Estimation, Definition of biological yield and economic yield, Yield Estimation of Field Crops

B.Sc.Ag. (Hons) Part-III    

Crop Yield Estimation. https://cststudy.blogspot.com/

Crop Yield Estimation 

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.

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