TY  - VF
TI  - Potassium
T2  - Rainbow Foreman Training Course
PY  - 0000///[198?]
CY  - Alabama : 
PB  - IMC Rainbow, 
KW  - Potassium
KW  - Plant nutrition
N2  - Explanation about the importance of potassium like a essential element in plants formation
ER  -