(a) The Mishnah permits peeling barley and eating it without Ma'asering it provided he does so one a time (see Tiferes Yisrael), without placing it into his other hand before eating it (see Tos. Yom-Tov).
(b) One may however, peel as many as one wants and eat them - when it is close to the threshing season (when they are placed in the granary), because at that stage, one tends to return the leftovers to the pile to be threshed.
(c) The Tana permits however, Molel Melilos of wheat - which means that, after they grains have been heated in the oven, one rolls them in one's hand to remove the outer husk and eats them.
(a) Wheat is more lenient than barley - in that even three grains are permitted (see Tiferes Yisrael).
(b) Before eating the kernels, he then gets rid of the husks - by emptying them from hand to hand.
(c) He is not permitted - to toss them on to his lap.
(a) The Mishnah rules that coriander seeds that one planted for ...
1. ... their seeds, but which actually grew into vegetables - are not subject to Ma'aser.
2. ... their vegetables, if he then harvested them either as vegetables or as seeds - are subject to Ma'aser.
(b) The reason for the difference is - because the seeds are more Chashuv than the vegetables. Consequently, once one plants for the seeds, the vegetables are not Chashuv, but not vice-versa.
(c) When, in addition to the two above types of harvest, he Rebbi Elazar adds 'Zirin' to aniseed seeds, he mean - that one is also obligated to Ma'aser them as branches. And they are Chayav Ma'asros in whichever way he harvests it - even if he planted them S'tam.
(d) The Chachamim disagree with Rebbi Elazar. According to them - the only two vegetables that, when planted S'tam, must be Ma'asered whether one ultimately eats them as seeds or as vegetables, are cress and 'Gargir' (the garden-rocket plant).
(a) Raban Shimon ben Gamliel rules that the branches (or the berries) of the fenugreek, mustard and white-bean plants - are all subject to Ma'asros.
(b) According to Rebbi Eliezer, the caper-bush fruit is subject to Ma'asros on three fronts, the Temaros ...
1. ... the Evyonos - the actual fruit, and ...
2. ... the Kapras - the peel which acts as a protection.
(c) Rebbi Akiva holds - that only the Kapras is subject to Ma'asros ...
(d) ... and the Halachah - is like Rebbi Akiva.