Abstract
The purpose of this study was to determine the accuracy of the method of long width method for measurement of corn leaf area ( Zea mays L.) and soybean ( Glycine max L) compared to method of leaf area meter. This study use designed by comparing the two methods, then the statistical test was done with the t-test. The result of this study showeed that correction factor (k) of leaf area length method obtained with Agustina (1988) version is not significantly different from Sitompul and Guritno version (1995). The k values used in the calculation of the leaf area with the long-width method of Sitompul & Guritno's (1995) version can be used at any age of observation on both corn and soybean crops, for Agustina (1988) the k value on corn leaves can be used every age of observation, but in soybean crop needs to be made a new k value at the age of the plant further (eg 5 MST) with the number of leaves more. The accuracy of the long-width method for measuring leaf area in maize compared with LAM method is quite high, Sitompul & Guritno (1995) version reaches 100% and Agustina's version is slightly lower that is 75%. The accuracy of Sitompul & Guritno (1995) and Agustina (1988) long-range method for measuring leaf area on soybean crops compared with very low LAM method is 25%. The accuracy of the method of length method times compared to LAM method toward measurement of corn leaf area is higher than in soybean crop Keywords: Leaf area, of corn and soybean leaf, Length method times width, Leaves
Highlights
Daun merupakan organ tubuh tanaman yang penting, karena pada daun terdapat komponen dan sekaligus tempat berlangsungnya proses fotosintesis, respirasi, dan transpirasi yang menentukan arah pertumbuhan dan perkembangan suatu tanaman
The purpose of this study was to determine the accuracy of the method of long width method
then the statistical test was done with the t-test. The result of this study showeed
Summary
Berdasarkan Tabel 1, walaupun tampak terlihat berbeda nilai rata-rata faktor koreksi kedua versi yang digunakan, namun hasil uji statistik menggunakan t-test menunjukkan bahwa pengukuran faktor koreksi (k) dengan versi. Sitompul & Guritno yang digunakan terhadap daun tanaman jagung maupun kedelai pada masing-masing umur tanaman [2, 3, 4] dan 5 MST menunjukkan t-eksprimen lebih kecil dibandingkan t-tabel maka secara statistik dikatakan berbeda tidak nyata pada selang kepercayaan 95 %. Kedua versi tersebut yakni versi Agustina (1988) dan Sitompul dan Guritno (1995) samasama dapat dipakai untuk mencari faktor koreksi (k) dalam pengukuran luas daun metode panjang kali lebar untuk tanaman jagung dan kedelai pada masing-masing umur yang berbeda (2, 3, 4 dan 5 MST). Hasil uji statistik t-test dari pengukuran faktor koreksi (fk) dengan dua versi Agustina (1988) dengan Sitompul & Guritno (1995) terhadap daun tanaman jagung dan kedelai dengan umur yang berbeda disajikan pada Tabel 2. Hasil uji statistik t-test dari perbandingan umur tanaman jagung maupun kedelai dari pengukuran faktor koreksi (fk) dengan dua versi Agustina (1988) dengan Sitompul & Guritno (1995)
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